Use Bayes's Rule to Find the Indicated Probability

Multiple Choice

Use Bayes's rule to find the indicated probability.
-Two stores sell a certain product. Store A has 40% of the sales, 3% of which are of defective items, and store B has 60% of the sales, 5% of which are of defective items. The difference in defective
Rates is due to different levels of pre-sale checking of the product. A person receives a defective Item of this product as a gift. What is the probability it came from store B?

A) 0.75
B) 0.3
C) 0.2857
D) 0.7143